chalybite
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chalybite
(kăl`əbīt'): see sideritesideriteor chalybite
, a mineral, varying in color from brown, green, or gray to black and occurring in nature in massive and crystalline form. A carbonate of iron, FeCO3, it serves as an iron ore, especially in the British Isles.
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chalybite
[′kal·ə‚bīt] (mineralogy)